// 	分别给每个图片延迟 
const pictBoxs = document.querySelectorAll('.pict-box'),
    texts = document.querySelectorAll('.text'),
    textCopts = document.querySelectorAll('.text-copy');
for (let i = 0; i < pictBoxs.length; i++) {
    pictBoxs[i].style.animationDelay = i * 4 + "s";
    texts[i].style.animationDelay = i * 4 + "s";
    textCopts[i].style.animationDelay = i * 4 + "s";

}
